All files / dash.js/src/streaming/rules DroppedFramesHistory.js

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import FactoryMaker from '../../core/FactoryMaker.js';
 
function DroppedFramesHistory() {
 
    let values = {};
    let lastDroppedFrames = {};
    let lastTotalFrames = {};
 
    function push(streamId, representationId, playbackQuality) {
 
        if (!representationId) {
            return;
        }
 
        if (!values[streamId]) {
            _initializeForStream(streamId);
        }
 
        let droppedVideoFrames = playbackQuality && playbackQuality.droppedVideoFrames ? playbackQuality.droppedVideoFrames : 0;
        let totalVideoFrames = playbackQuality && playbackQuality.totalVideoFrames ? playbackQuality.totalVideoFrames : 0;
 
        let intervalDroppedFrames = droppedVideoFrames - lastDroppedFrames[streamId];
        lastDroppedFrames[streamId] = droppedVideoFrames;
 
        let intervalTotalFrames = totalVideoFrames - lastTotalFrames[streamId];
        lastTotalFrames[streamId] = totalVideoFrames;
 
        const current = values[streamId];
        if (!current[representationId]) {
            current[representationId] = {
                droppedVideoFrames: intervalDroppedFrames,
                totalVideoFrames: intervalTotalFrames
            };
        } else {
            current[representationId].droppedVideoFrames += intervalDroppedFrames;
            current[representationId].totalVideoFrames += intervalTotalFrames;
        }
 
    }
 
    function _initializeForStream(streamId) {
        values[streamId] = [];
        lastDroppedFrames[streamId] = 0;
        lastTotalFrames[streamId] = 0;
    }
 
    function getFrameHistory(streamId) {
        return values[streamId];
    }
 
    function clearForStream(streamId) {
        delete values[streamId];
        delete lastDroppedFrames[streamId];
        delete lastTotalFrames[streamId];
    }
 
    function reset() {
        values = {};
        lastDroppedFrames = {};
        lastTotalFrames = {};
    }
 
    return {
        clearForStream,
        getFrameHistory,
        push,
        reset
    };
}
 
DroppedFramesHistory.__dashjs_factory_name = 'DroppedFramesHistory';
const factory = FactoryMaker.getClassFactory(DroppedFramesHistory);
export default factory;